142326505 has 4 divisors (see below), whose sum is σ = 170791812. Its totient is φ = 113861200.

The previous prime is 142326497. The next prime is 142326521. The reversal of 142326505 is 505623241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505623241 = 37 ⋅13665493.

It can be written as a sum of positive squares in 2 ways, for example, as 38775529 + 103550976 = 6227^2 + 10176^2 .

It is not a de Polignac number, because 142326505 - 2³ = 142326497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14232646 + ... + 14232655.

It is an arithmetic number, because the mean of its divisors is an integer number (42697953).

Almost surely, 2^142326505 is an apocalyptic number.

It is an amenable number.

142326505 is a deficient number, since it is larger than the sum of its proper divisors (28465307).

142326505 is an equidigital number, since it uses as much as digits as its factorization.

142326505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28465306.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 142326505 is about 11930.0672672035. The cubic root of 142326505 is about 522.1099001342.

Adding to 142326505 its reverse (505623241), we get a palindrome (647949746).

The spelling of 142326505 in words is "one hundred forty-two million, three hundred twenty-six thousand, five hundred five".